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Vol. 17. Issue 2.
Pages 53-55 (March - April 1981)
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Vol. 17. Issue 2.
Pages 53-55 (March - April 1981)
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Aislamiento de M. Tuberculosis, en funcion del grado de contaminacion del esputo
Isolation of m. tuberculosis in functio of the degree of contamination of the sputum.
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V. Ausina, C. Marti, B. Mirelis, N. Rabella
Servicio de Microbiología. Hospital de la Santa Cruz y San Pablo. Barcelona.
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Resumen

Un total de 1.496 esputos remitidos al laboratorio para cultivo de M. tuberculosis se han clasificado en siete subgrupos en base al grado de contaminación bucofaríngea según los criterios microscópicos propuestos por la American Society for Microbiology (Cumitech, 7).

De las 153 cepas de M. tuberculosis aisladas, 43 (28,1 %) procedían de esputos con gran contaminación bucofaríngea (subgrupos 1 y 2) y 89 (58,2 %) de esputos con escasa o nula contaminación (subgrupos 3, 4 y 5). Las diferencias en el número de aislamientos de ambos grupos son estadísticamente significativas (x2 = 15,39 P < 0,01). Sin embargo, ningún laboratorio clí-nico está autorizado a rechazar los esputos conalto grado de contaminación bucofaríngea destinados a cultivo de M. tuberculosis ya que la proporción global de aislamientos en este grupo de muestras es del 7,1 %.

Summary

A total of 1,496 sputum sent to the laboratory for culture of M. tuberculosis were classified into seven subgroups based on the degree of bucopharyngeal contamination according to the microscopic criteria proposed by the American Society for Microbiology.

Of. the 153 strains of M. tuberculosis that were isolated, 43 (28.1 %) carne from sputum with great buccopharyngeal contamination (subgroups 1 and 2); and 89 (58.2 %) from sputum with scarse or nuil contamination (subgroups 3, 4 and 5). The differences in the number of isolations of both groups are statistically significant (x2 = 14.39 P < 0.01). However, no clinical laboratory is authorized to reject sputum with high degree of buccopharyngeal contamination destined to the culture of M. tuberculosis as the global proportion of isolations in this group of samples is of 7.1 %.

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Copyright © 1981. Sociedad Española de Neumología y Cirugía Torácica
Archivos de Bronconeumología

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